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Merge branch 'contrib/github_pr_14196_v5.2' into 'release/v5.2'

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fix(esp_http_server): prevent concurrent access to socket used in async http requests (GitHub PR) (v5.2)

See merge request espressif/esp-idf!34685
This commit is contained in:
Mahavir Jain
2024-11-06 17:43:00 +08:00
parent c233332f03 83216d64e4
commit 450d5378ff
3 changed files with 75 additions and 53 deletions
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5
components/esp_http_server/src/httpd_main.c
View File

@@ -247,6 +247,11 @@ static int httpd_process_session(struct sock_db *session, void *context)
return 1;
}
// session is busy in an async task, do not process here.
if (session->for_async_req) {
return 1;
}
process_session_context_t *ctx = (process_session_context_t *)context;
int fd = session->fd;

3
components/esp_http_server/src/httpd_sess.c
View File

@@ -72,6 +72,7 @@ static int enum_function(struct sock_db *session, void *context)
case HTTPD_TASK_INIT:
session->fd = -1;
session->ctx = NULL;
session->for_async_req = false;
break;
// Get active session
case HTTPD_TASK_GET_ACTIVE:
@@ -87,7 +88,7 @@ static int enum_function(struct sock_db *session, void *context)
break;
// Set descriptor
case HTTPD_TASK_SET_DESCRIPTOR:
if (session->fd != -1) {
if (session->fd != -1 && !session->for_async_req) {
FD_SET(session->fd, ctx->fdset);
if (session->fd > ctx->max_fd) {
ctx->max_fd = session->fd;

120
components/esp_http_server/src/httpd_txrx.c
View File

@@ -1,5 +1,5 @@
/*
* SPDX-FileCopyrightText: 2018-2021 Espressif Systems (Shanghai) CO LTD
* SPDX-FileCopyrightText: 2018-2024 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
@@ -392,54 +392,54 @@ esp_err_t httpd_resp_send_err(httpd_req_t *req, httpd_err_code_t error, const ch
const char *status;
switch (error) {
case HTTPD_501_METHOD_NOT_IMPLEMENTED:
status = "501 Method Not Implemented";
msg = "Server does not support this method";
break;
case HTTPD_505_VERSION_NOT_SUPPORTED:
status = "505 Version Not Supported";
msg = "HTTP version not supported by server";
break;
case HTTPD_400_BAD_REQUEST:
status = "400 Bad Request";
msg = "Bad request syntax";
break;
case HTTPD_401_UNAUTHORIZED:
status = "401 Unauthorized";
msg = "No permission -- see authorization schemes";
break;
case HTTPD_403_FORBIDDEN:
status = "403 Forbidden";
msg = "Request forbidden -- authorization will not help";
break;
case HTTPD_404_NOT_FOUND:
status = "404 Not Found";
msg = "Nothing matches the given URI";
break;
case HTTPD_405_METHOD_NOT_ALLOWED:
status = "405 Method Not Allowed";
msg = "Specified method is invalid for this resource";
break;
case HTTPD_408_REQ_TIMEOUT:
status = "408 Request Timeout";
msg = "Server closed this connection";
break;
case HTTPD_414_URI_TOO_LONG:
status = "414 URI Too Long";
msg = "URI is too long";
break;
case HTTPD_411_LENGTH_REQUIRED:
status = "411 Length Required";
msg = "Client must specify Content-Length";
break;
case HTTPD_431_REQ_HDR_FIELDS_TOO_LARGE:
status = "431 Request Header Fields Too Large";
msg = "Header fields are too long";
break;
case HTTPD_500_INTERNAL_SERVER_ERROR:
default:
status = "500 Internal Server Error";
msg = "Server has encountered an unexpected error";
case HTTPD_501_METHOD_NOT_IMPLEMENTED:
status = "501 Method Not Implemented";
msg = "Server does not support this method";
break;
case HTTPD_505_VERSION_NOT_SUPPORTED:
status = "505 Version Not Supported";
msg = "HTTP version not supported by server";
break;
case HTTPD_400_BAD_REQUEST:
status = "400 Bad Request";
msg = "Bad request syntax";
break;
case HTTPD_401_UNAUTHORIZED:
status = "401 Unauthorized";
msg = "No permission -- see authorization schemes";
break;
case HTTPD_403_FORBIDDEN:
status = "403 Forbidden";
msg = "Request forbidden -- authorization will not help";
break;
case HTTPD_404_NOT_FOUND:
status = "404 Not Found";
msg = "Nothing matches the given URI";
break;
case HTTPD_405_METHOD_NOT_ALLOWED:
status = "405 Method Not Allowed";
msg = "Specified method is invalid for this resource";
break;
case HTTPD_408_REQ_TIMEOUT:
status = "408 Request Timeout";
msg = "Server closed this connection";
break;
case HTTPD_414_URI_TOO_LONG:
status = "414 URI Too Long";
msg = "URI is too long";
break;
case HTTPD_411_LENGTH_REQUIRED:
status = "411 Length Required";
msg = "Client must specify Content-Length";
break;
case HTTPD_431_REQ_HDR_FIELDS_TOO_LARGE:
status = "431 Request Header Fields Too Large";
msg = "Header fields are too long";
break;
case HTTPD_500_INTERNAL_SERVER_ERROR:
default:
status = "500 Internal Server Error";
msg = "Server has encountered an unexpected error";
}
/* If user has provided custom message, override default message */
@@ -575,9 +575,24 @@ esp_err_t httpd_req_async_handler_begin(httpd_req_t *r, httpd_req_t **out)
}
memcpy(async->aux, r->aux, sizeof(struct httpd_req_aux));
// Copy response header block
struct httpd_data *hd = (struct httpd_data *) r->handle;
struct httpd_req_aux *async_aux = (struct httpd_req_aux *) async->aux;
struct httpd_req_aux *r_aux = (struct httpd_req_aux *) r->aux;
async_aux->resp_hdrs = calloc(hd->config.max_resp_headers, sizeof(struct resp_hdr));
if (async_aux->resp_hdrs == NULL) {
free(async_aux);
free(async);
return ESP_ERR_NO_MEM;
}
memcpy(async_aux->resp_hdrs, r_aux->resp_hdrs, hd->config.max_resp_headers * sizeof(struct resp_hdr));
// Prevent the main thread from reading the rest of the request after the handler returns.
r_aux->remaining_len = 0;
// mark socket as "in use"
struct httpd_req_aux *ra = r->aux;
ra->sd->for_async_req = true;
r_aux->sd->for_async_req = true;
*out = async;
@@ -593,6 +608,7 @@ esp_err_t httpd_req_async_handler_complete(httpd_req_t *r)
struct httpd_req_aux *ra = r->aux;
ra->sd->for_async_req = false;
free(ra->resp_hdrs);
free(r->aux);
free(r);
@@ -619,7 +635,7 @@ static int httpd_sock_err(const char *ctx, int sockfd)
int errval;
ESP_LOGW(TAG, LOG_FMT("error in %s : %d"), ctx, errno);
switch(errno) {
switch (errno) {
case EAGAIN:
case EINTR:
errval = HTTPD_SOCK_ERR_TIMEOUT;